P0700-- Transmission Control System Malfunction - Diesel Place : Chevrolet and GMC Diesel Truck Forums
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Allison OEM Discuss repairing & maintaining an OEM Allison automatic transmission.

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Old 12-14-2009, 11:04 AM   #1 (permalink)
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P0700-- Transmission Control System Malfunction

I had this code come up over the weekend.....anyone know how to fix it.... truck was driving like i had the towhaul button on...staying in each gear longer before upshifts...i cleared the tune and loaded another and it went away..... but it still shows up on diagnostics even tho it shifts fine????

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Old 12-14-2009, 12:07 PM   #2 (permalink)
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P0700 does not say what is wrong. P0700 is stored in the PCM to alert a technician that there are codes presently stored in the TCM. You need to have the TCM codes read in order to determine what is causing the P0700 code to be stored in the PCM.

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